[LeetCode] 2579. Count Total Number of Colored Cells

Problem https://leetcode.com/problems/count-total-number-of-colored-cells/description/ Leetcode - Count Total Number of Colored Cells Type - Math Difficulty - Medium Approach & Solution f(0) = 0; f(1) = 1; f(2) = 5; f(3) = 13; … So, we can derive for...